Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2012 Kia Optima SXFACTORY OEM SERVICE PROCEDURE
Trunk Release Relay Control: Overview
WARNING: This page is about a different variant/trim than selected.
- Trunk Release Relay is ON during T1 when TX Trunk signal received. (NON-SMK)
Trunk Release Relay is ON during T1 when SMK RKE Trunk signal received. (NON-SMK)
- Trunk Release Relay is ON during T1 when Trunk Release switch is OFF->ON.
But, ARMWAIT, ARM, REARM, ALARM mode, the Trunk Release switch input of the output does not.
T1: 500 ± 100msec
Factory Service Tools
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.